Northstar Engines and System Technical Discussion Discussion, Top End Setting? in Cadillac Engine Technical Discussion; Does anyone know how to view, or change, the setting that was used for limiting top speed on a 2000 ...

Top End Setting?

Does anyone know how to view, or change, the setting that was used for limiting top speed on a 2000 DeVille DHS N* with 275 HP? I have "H" rated performance tires, same as the OEM tires were when originally delivered. They are rated to 150+ MPH. I would like to know before ever attempting to reach that limit on the highway. Not that I intend to do that any time soon.
But one never knows

Re: Top End Setting?

First, H rated tires are only rated for 130mph, not 150. Second, the only fewasable way to remove the governor is to find a shop that can reprogram your PCM with the info from a Z-rated DTS, which probably won't even work. It would also be quite expensive.